Sea stars are genetically different from each other and from their parents. These genetic differences are the result of
A) asexual reproduction. B) sexual reproduction.
C) cloning. D) mitosis.
B
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Certain small towns in the western United States have remained isolated and inbred since their settlement many years ago. Some alleles are more common in these communities as compared to the rest of the population. This effect is known as
A. directional selection. B. artificial selection. C. founder effect. D. Hardy-Weinberg principle. E. disrupting selection.
Fungi are made of bundles of threadlike ________.
A. chitins B. mycelia C. lichens D. hyphae
Each day, a bean plant holds its leaves horizontally during the day but folds them close to its stem at night. This is an example of:
a. photoperiodism b. vernalization c. circadian rhythm d. phytochromatic pattern e. systemic acquired rhythm
Errors in nucleotide sequence that occurs during replication CANNOT be corrected.
a. true b. false